Question: Who is the {copolymer} for {monomer of} of {ethylene}
Paraphrase: Who is the {copolymer} for {monomer of} of {ethylene}
SPARQL (Wikidata):  select distinct ?obj where { wd:Q151313 wdt:P4599 ?obj . ?obj wdt:P31 wd:Q421281 } 
Answer: ethylene-vinyl acetate